from fastvideo import VideoGenerator
from fastvideo.api import (
    EngineConfig, GenerationRequest, GeneratorConfig, OffloadConfig, OutputConfig,
)


def main():
    # Point this to your local diffusers model dir (or replace with a HF model ID).
    model_path = "KyleShao/Cosmos-Predict2.5-2B-Diffusers"

    generator = VideoGenerator.from_config(
        GeneratorConfig(
            model_path=model_path,
            engine=EngineConfig(
                num_gpus=1,
                use_fsdp_inference=False,  # set True if GPU is out of memory
                offload=OffloadConfig(
                    dit=False,
                    vae=False,
                    text_encoder=True,
                    pin_cpu_memory=True,
                ),
            ),
        )
    )

    prompt = (
        "A high-definition video captures the precision of robotic welding in an industrial setting. "
        "The first frame showcases a robotic arm, equipped with a welding torch, positioned over a large metal structure. "
        "The welding process is in full swing, with bright sparks and intense light illuminating the scene, "
        "creating a vivid display of blue and white hues. "
        "A significant amount of smoke billows around the welding area, partially obscuring the view but emphasizing the heat and activity. "
        "The background reveals parts of the workshop environment, including a ventilation system and various pieces of machinery, "
        "indicating a busy and functional industrial workspace. "
        "As the video progresses, the robotic arm maintains its steady position, continuing the welding process and moving to its left. "
        "The welding torch consistently emits sparks and light, and the smoke continues to rise, diffusing slightly as it moves upward. "
        "The metal surface beneath the torch shows ongoing signs of heating and melting. "
        "The scene retains its industrial ambiance, with the welding sparks and smoke dominating the visual field, "
        "underscoring the ongoing nature of the welding operation."
    )

    generator.generate(
        GenerationRequest(
            prompt=prompt,
            output=OutputConfig(
                output_path="outputs_video/cosmos2_5_t2w.mp4",
                save_video=True,
            ),
        )
    )

    generator.shutdown()


if __name__ == "__main__":
    main()